Serious hunters are picky about their guns and optics. Your optics play a big role in helping you wring out maximum accuracy at extended ranges. The C4 riflescopes are a perfect combination of premium optics with the ultimate in click adjustment. Burris' V4 (Cartridge Calibrated Custom Clicker) system gives shooters and hunters the ability to match the elevation adjustment to their favorite cartridge and bullet making pinpoint accuracy easier to achieve. Send Burris your cartridge information on-line and they will provide a custom knob that matches your favorite load. your custom elevation knob also shows you, in MOA, the 10mph wind for your cartridge that matches the distance. All you have to worry about is hold-off for wind with the simple-to-use C4 Wind MOA reticle. The C4 Wind MOA reticle eliminates the guesswork with MOA tick marks that extend out to 10 MOA in each direction.Available in four models- 3-9z40mm and 4.5-14x42mm in a choice of 1" and 30mm tubes- each offers ultra-premium glass and index matched Hi-Lume multi-coatings for enhanced clarity, edge-to-edge sharpness and low-light performance. Hunter-friendly features include rugged one-piece tubes; low profile adjustment knobs with positive repeatable click adjustments; easy-to-adjust parallax rings (4.5-14 models only); ergonomic power rings and quick adjust eyepiece diopters.